abstract background blinds brown horizontal lamellae old painted pastel structure structures texture textures used weathered wood wooden worn backdrop colour colours element grain hues natural rustic series shades surface timber tones variations blue city decay grunge grungy peeled plank planks paint urban urban decay ocre paint shape shapes stripes symmetric triangle triangles triangular white yellow craft decorative diagonal handcraft handicraft nails planks square struchture turquoise annual bark forest nature rings rip tree trees trunk trunks board floor flooring ground parquet parquetry pattern planking timbered